Clamping device for tank assembly

A method of attaching a component to a vessel having a boss with an adapter comprising:

• providing an assembly comprising:
• an adjustable frame including a support positioned between a first end and a second end, the frame adjustable in at least one of an x, y, and z direction;
• a fixed clamping device attached to the first end of the frame, the fixed clamping device comprising a lower plate and an upper plate pivotally attached to the lower plate, at least one of the lower and upper plates having a jaw formed therein, the jaw being shaped to hold a first adapter;
• a rotatable clamping device on the second end of the frame, the rotatable clamping device comprising a lower clamping plate, a lower plate rotatably attached to the lower clamping plate so that movement of the lower clamping plate causes rotation of the lower plate, and an upper plate pivotally attached to the lower plate, at least one of the lower and upper plates having a jaw formed therein, the jaw being shaped to hold a second adapter;
• placing the vessel on the support;
• rotating the vessel so that the first adapter fits into the jaw of one of the fixed clamping device or the rotatable clamping device;
• closing the upper plate of the one of the fixed clamping device or the rotatable clamping device to clamp the first adapter in place;
• rotating the vessel so that the second adapter fits into the jaw of the other of the fixed clamping device or the rotatable clamping device;
• closing the upper plate of the other of the fixed clamping device or the rotatable clamping device to clamp the second adapter in place;
• attaching at least one component to the first or second adapter.